Revert temporary workaround for ACM installation

Latest ACM installation works and the workaround to use older version removed.

Issue-ID: NONRTRIC-990
Change-Id: I396e9997a399710ddf1243a9bbc44ab9d9017b30
Signed-off-by: aravind.est <aravindhan.a@est.tech>

scripts/install/install-acm.sh

@@ -52,9 +52,6 @@ function wait_for_pods_to_be_running() {
 }
 
 git clone "https://gerrit.onap.org/r/policy/docker"
-pushd docker
-git fetch https://gerrit.onap.org/r/policy/docker refs/changes/46/137546/1 && git checkout FETCH_HEAD
-popd
 
 CWD=$(pwd)
 export WORKSPACE="$CWD/docker"